linux

661 Articles

Lindroid Promises True Linux On Android

June 18, 2024 by 16 Comments

Since Android uses Linux, you’d think it would be easier to run Linux apps on your Android phone or tablet. There are some solutions out there, but the experience is usually less than stellar. A new player, Lindroid, claims to provide real Linux distributions with hardware-accelerated Wayland on phones. How capable is it? The suggested window manager is KDE’s KWIN. That software is fairly difficult to run on anything but a full-blown system with dbus, hardware accelerations, and similar features.

There are, however, a few problems. First, you need a rooted phone, which isn’t totally surprising. Second, there are no clear instructions yet about how to install the software. The bulk of the information available is on an X thread. You can go about 4 hours into the very long video below to see a slide presentation about Lindroid.

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Raspberry Pi Saves Printer From Junk Pile

June 13, 2024 by 55 Comments

Around here, printers have a life expectancy of about two years if we are lucky. But [techtipsy] has a family member who has milked a long life from an old Canon PIXMA printer. That is, until Microsoft or Canon decided it was too old to print anymore. With Windows 10, it took some hacking to get it to work, but Windows 11 was the death knell. Well, it would have been if not for [techtipsy’s] ingenuity with a Raspberry Pi.

The Pi uses Linux, and, of course, Linux will happily continue to print without difficulty. If you are Linux savvy, you can probably see where this is going.

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Linux Fu: The Root Cause

May 21, 2024 by 22 Comments

There was a time when real system administrators just logged into Unix systems as root. But as we all know — with great power comes great responsibility. It’s too easy to do terrible things when you are really just trying to do normal work, and, on top of that, malicious software or scripts can do naughty things without you noticing. So common practice quickly changed to where an administrator had a personal account but then had a way to run certain programs “as root” which means you had to deliberately decide to wield your power.

Before long, people realized you don’t even need a root login account. That way, an attacker can’t try to log into root at all. Sure, they could still compromise your account, but a random hacker knows you might have a root user, but it is harder to guess that your login ID is JTKirkJr or whatever.

There are other ways to control what users can do, but many Linux and Unix installations still use this model. The root can do everything but login, and specific users get the privilege to do certain things.

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This Windows Installer Installs Linux

May 5, 2024 by 15 Comments

It may be a very long time since some readers have installed a copy of Windows, but it appears at one point during the installation there’s a step that asks you which OS version you would like to install. Normally this is populated by whichever Windows flavours come on the install medium, but [Naman Sood] has other ideas. How about a Windows installer with Alpine Linux as one of the choices? Sounds good to us.

You can see it in action in the video below the break. Indeed Alpine Linux appears as one of the choices, followed by the normal Windows licence accept screen featuring the GPL instead of any MS text. The rest of the installer talks about installing Windows, but we can forgive it not expecting a Linux install instead.

So, the question we’re all asking is: how is it done? The answer lies in a WIM file, a stock Windows image which the installer unpacks onto your hard drive. The Linux distro needs to be installable onto an NTFS root partition, and to make it installable there’s a trick involving the Windows pre-installation environment.

This is an amusing hack, but the guide admits it’s fragile and perhaps not the most useful. Even so, the sight of Linux in a Windows installer has to be worth it.

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This Week In Security: Default Passwords, Lock Slapping, And Mastodown

May 3, 2024 by 8 Comments

The UK has the answer to all our IoT problems: banning bad default passwords. Additionally, the new UK law requires device makers to provide contact info for vulnerability disclosures, as well as a requirement to advertise vulnerability fix schedules. Is this going to help the security of routers, cameras, and other devices? Maybe a bit.

I would argue that default passwords are in themselves the problem, and complexity requirements only nominally help security. Why? Because a good default password becomes worthless once the password, or algorithm leaks. Let’s lay out some scenarios here. First is the static default password. Manufacturer X makes device Y, and sets the devices to username/password admin/new_Complex_P@ssword1!. Those credentials make it onto a default password list, and any extra security is lost.

What about those devices that have a different, random-looking password for each device? Those use an algorithm to derive that password from the MAC address and/or serial number. That may help the situation, but the algorithm can be retrieved from the firmware, and most serial numbers are predictable in one way or another. This approach is better, but not a silver bullet.

So what would a real solution to the password problem look like? How about no default password at all, but no device functionality until the new password passes a cracklib complexity and uniqueness check. I have seen a few devices that do exactly this. The requirement for a disclosure address is a great idea, which we’ve talked about before regarding the similar EU legislation.

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Linux Fu: Stupid Systemd Tricks

April 16, 2024 by 17 Comments

Last time, I gave a whirlwind introduction to a very small slice of systemd. If you aren’t comfortable with systemd services, timers, and mounts, you might want to read that now. Otherwise, press on to see a few interesting uses for custom systemd units, including running a few things on a schedule and automatically mounting a Raspberry Pi Zero.

Can you do every one of these things in a different way? Of course you can. I’m not debating the relative merits of using or not using systemd. However, unless you totally control your own environment, good chance you are going to have to interact with systemd at some point.

Stupid Trick #1: Update Your IP Address

A few years ago, I talked about updating your remote DNS server with your public IP address. This lets you refer to a hostname like snoopy.hackaday.com and get back to your computer that often changes IP addresses. Sure, you can get services to do that for you, but you must either pay or agree to read ads on their site to keep your hostname going. This is all under your control. In the original post, I suggested using cron or NetworkManager to run the update script. I also hinted you could do it with systemd, but I didn’t tell you how. Let’s fix that.

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